. >> reporter: with some of his holiday shopping done, president obama may begetting a gift from some republicans, republicans who signed a pledge never to raise taxes. >> i will violate the pledge, long story short, for the good of the country, only if democrats will do entitlement reform. >> and senator chambliss says he won't necessarily abide by the pledge. support from a vocal republican house too. >> i agree with saxby chambliss. the world has changed. >> reporter: they are talking about this man's pledge, americans for tax reform president, who has gotten hundreds of republican whose sign. do you feel like you and your pledge are under assault? >> no. what the pledge does of course is allows, elected officials, to make it clear openly to the american voters where they stand. are tla they going to be a reforming government or raise tacks to continue more of the same? >> reporter: norquist's threat, he will help fund republican campaign challenges against any member of congress that violates the pledge. >> so what i think i hear you saying, we won't go over the cliff? >> i think